Risk assessment of a dam-break using GIS technology

Şeker, Dursun Zafer; Kabdasli̇, S.; Rudvan, B.

doi:10.2166/wst.2003.0546

Cited by 20 publications

(9 citation statements)

References 4 publications

(3 reference statements)

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“…The role of GIS technologies in rapid health needs assessment, damage estimation, vulnerability determination, and prevention and management has been demonstrated in a myriad of disasters as well as in post-disaster situations and settings throughout the world. [4][5][6][7][8][9][10][11][12][13][14][15][16][17][18] Mobile medical clinics have been used in the past in Somalia, but the impact of continued conflict on their effectiveness has not been studied. 19 Nonetheless, use of a specially created map to plan and guide the delivery of reproductive health services for IDP camp populations in the context of an outreach mobile clinic has not been documented in a disaster situation.…”

Section: Discussionmentioning

confidence: 99%

Nurses' Use of Global Information Systems for Provision of Outreach Reproductive Health Services to Internally Displaced Persons

Shaikh¹

2008

Prehosp. Disaster med.

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Introduction:A long and protracted civil war compounded by the occurrence of nature-related disasters have forced thousands of Somalis to take refuge in camps for internally displaced persons (IDPs) to escape violence and seek shelter. Dwellers of these camps have limited accessibility to and affordability of the fractured healthcare facilities located in nearby towns. A free, outreach, mobile, reproductive healthcare delivery system staffed with nurses and using an ambulance guided by a global information systems (GIS) map was established to address the accessibility and affordability issues hindering provision of quality reproductive healthcare to the women in the IDP camps and in the outskirts of Baidoa City, Somalia.Methods:All 14 IDP camps in Baidoa City were visited to determine the number of families/huts, and to acquire their global positioning system (GPS) central point locations. Global information systems (GIS) shape files containing major roads, river, and dwellings, and straight-line distances from the base clinic to each IDP camp were computed. The objective of creating and using this specially designed map was to help nurses in determining which camps realistically could be visited on a given day, and how best to access them considering the security situation and the condition of rain-affected areas in the city.Results:Use of the GIS map was instrumental in facilitating the delivery of healthcare services to IDPs and ensuring that resources were adequately utilized. Free healthcare services were provided each work day for the month long duration of the project; 3,095 consultations were provided, inclusive of 948 consultations for children under the age of 16 years, and delivery of three babies.Conclusions:Creation and use of a simple, need-specific GIS map in this pilot project effectively aided the logistical planning and delivery of mobile, outreach reproductive health services by directing the ambulance and nurses safely to accessible IDP camps in an area marred with long and protracted disasters from both natural and human causes.

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Section: Discussionmentioning

confidence: 99%

Nurses' Use of Global Information Systems for Provision of Outreach Reproductive Health Services to Internally Displaced Persons

Shaikh¹

2008

Prehosp. Disaster med.

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“…Annual mean precipitation in the catchment is 800 mm and mainly falls between November and January. The reservoir is of great importance with its 160 km 2 drainage area and 65 million m 3 water capture capacity (Seker et al, 2003). It provides 3.4% of daily drinking water supply (98600 m 3 ) of the city (Ustun, 2010 (Ozdemir and Akar, 2009).…”

Section: Study Areamentioning

confidence: 99%

Assessing the Sensitivity of SWMM to Variations in Hydrological and Hydraulic Parameters: A Case Study for the city of Istanbul

2016

Global NEST Journal

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Overland flow is highly affected by increasing urbanization, and variations in land use and climatic variables, especially in the last few decades. This necessitates the development of modeling approaches for planning and management of catchments that play a significant role on water supply. The main objective of this study is to determine the effects of major hydrological and hydraulic parameters on runoff production in the Alibeyköy Reservoir catchment area in Istanbul. Storm Water Management Model (SWMM) is chosen to develop the catchment hydrological model and the model's sensitivity is assessed based on the variations in eight major parameters of the model affecting runoff production. 55 years of time series precipitation data are used for model simulations. GIS-based maps including land use and land cover information are used to determine the imperviousness values required for SWMM. A oneat-a-time parametric sensitivity analysis is carried out to determine the most significant parameters affecting the model outcomes. Analysis results reveal that area of subcatchments, precipitation and conduit depth are the most significant parameters in SWMM affecting runoff production. Percent imperviousness and percent slope are the least significant parameters amongst other parameters influencing the output.

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“…Many tools for Dam break flood modeling, such as HEC-RAS [25], WOLF 2D [26,27], MIKE [28], SOBEK [7], and others [29], can be found, and HEC-RAS was used in this study for its universality and usability. In this tool, unsteady flow analysis is used to conduct the flood modeling in this study.…”

Section: Dam Break Flood Modeling Theory and Toolmentioning

confidence: 99%

Dam Break Flood Risk Assessment for Laiyang City

Li¹,

Hong²,

Zhixue³

et al. 2014

JGRE

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Abstract:A dam failure analysis was performed for the City of Laiyang to determine the flood inundation extents and the breach velocities of a hypothetical failure of the Muyu Reservoir Dam in Shandong Province, China. The study was carried out in four steps. First, the possible reasons of the dam failure were analyzed, and the extreme hydrological event was identified as the most critical cause. Second, a numerical simulation of the dam break flood was performed. The key factors considered in this simulation include the water level at the dam (the check flood water level), the inflow to the reservoir (the check flood hydrograph), and two typical structural scenarios (with/without-levees) along the river reach downstream of the reservoir. Third, based on flood simulations, flood hazard risk analysis was conducted and the results indicate that the peak discharge would be over 40,000 m 3 /s at the breachand over 22,000 m 3 /s near Laiyang City. As a result, most of the urban area would be flooded; the duration from the beginning of the dam break to the arrival of peak discharge at Laiyang City is less than half an hour. Finally, a plan for integrated dam break flood management was presented to mitigate the flood risk; both available structural and nonstructural measures were proposed according to the situations in the river basin.The main strategic advises include flood emergency planning, flood risk mapping, flood monitoring and early warning system construction, reservoir regulation, and flood risk public awareness.

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Risk assessment of a dam-break using GIS technology

Cited by 20 publications

References 4 publications

Nurses' Use of Global Information Systems for Provision of Outreach Reproductive Health Services to Internally Displaced Persons

Nurses' Use of Global Information Systems for Provision of Outreach Reproductive Health Services to Internally Displaced Persons

Assessing the Sensitivity of SWMM to Variations in Hydrological and Hydraulic Parameters: A Case Study for the city of Istanbul

Dam Break Flood Risk Assessment for Laiyang City

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